<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form action="/request_demo3" method="post">
    <input name="username" type="text"><br>
    <input name="password" type="password"><br>

        <input type="submit" value="登录">
    </form>
    <hr>


</body>
</html>